James edmund carroll



5 0 J. E. CARROLL.

BOILER FEED WATER HEATINGAND PURIFYING APPARATUS. No. 585,814. PatentedJuly 6, 1897.

I V I 11/1 UNITED STATEsj PATENT FFIQE.

JAMES EDMUND CARROLL, OF LONDON, ENGLAND.

BOILER FEED-WATER HEATING AND PURIFYING APPARATUS.

SPECIFICATION forming part of Letters Patent No. 585,814, dated July 6,1897.

Application filed October 20,1896. 'Serial No. 609,424. (No model.)Patented in England March 6,1895,N0.4,'792; in France January 4, 1896,No. 252,960,- in Belgium January 9, 1896,No.119,464; in TransvaalJanuary 24, 1896, No. 1,054,

and in Western Australia February 18, 1896, No. 839.

To all whom, it may concern.-

Be it known that I, J AMES EDMUND GAE- ROLL, engineer, a citizen of theUnited States of America, residing at Albany Buildings, 39 VictoriaStreet, \Vestininster, London, England, have invented certain new anduseful Improvements in Boiler Feedater Heating and Purifying Apparatus,of which the following is a specification, reference being had thereinto the accompanying drawings.

Patents have been granted for this invention in England, No. 4,792,dated March 6, 1895; in France, No. 252,960, dated January 4, 1896; inBelgium, No. 119,464, dated January 9, 1896; in Transvaal, No. 1,054,dated January 24, 1896, and in Western Australia, No. 839, datedFebruary 18, 1896.

This invention relates to certain' improvements in apparatus and meansfor purifying and heating feed-water for steam-boilers by eliminatingsalts and other foreign substances therefrom and thereby rendering suchwater more serviceable for use in steam-boilers. I attain these objectsby the arrangements illustrated upon the accompanying drawings,uponwhich Figure 1 is a longitudinal section of a boiler provided with anapparatus constructed according to my invention. Fig. 2 is a sectionalplan of the same, Fig. 3 being a front elevation, and Fig. 4 atransverse section, of the same. Fig. 5 is an enlarged section of thesettling-box; Fig. 6, an enlarged section of one end of the tube, andFig. 7 a longitudinal section showing connection to end plate.

Similar letters refer to similar parts throughout the several views.

In applying my invention to a Cornish or horizontal boiler, which mayotherwise be of ordinary construction, I arrange two tubes A B withinthe steam-space, the ends of which tubes are prolonged through theplates at both ends of the boiler and are secured thereto in such amanner as to serve the purpose of stays, thereby materially increasingthe resisting strength of the boiler. The tubes A B are preferablyarranged parallel to each other and in a longitudinal direction abovethe level of the water. At the rear end of the boiler the tubes areconnected together by means of a cross-tube 0, arranged outside theboiler, as shown on Figs. 1 and 2.

At preferably the front end of the boiler, as shown on Fig. 3, is fittedthe water-supply pipe D, which is provided with a suitable valve or cookE and is connected by a small branch pipe F with the steam-space of theboiler or with the regulating-cock or with the live steam pipe. Thetransverse pipe O, which is arranged at the other extremity of theboiler, is to convey the feed-water which has passed through theinlettube A to the return-tube B.

The second or return tube B, after passing outthrough the front end ofthe boiler, enters a settling-box G, from which a branch 11, furnishedwith a valve or cook I and preferably arranged at one side, connects itwith the boiler, and a second pipe K, also furnished with a cock L,leads from the bottom of the settling-box G to the drain or blow-off.

In operation water is admitted through the supply-pipe D into thelongitudinal tube A and flows in the direction indicated by the arrowson Figs. 1 and 2 through the inlettube into the transverse tube 0 at therear end of the boiler and thence through the other longitudinal tube B,being delivered through the connecting-pipe into the settlingbox G,whence it passes out and into the boiler. In its passage through thetubes A B, the feed-water having been heated to steam temperature, allscale-formin g matters it may contain will be deposited in the tubes,while any oil, grease, or matter in suspension still remaining will bedeposited in the settlingboX G, so that the feed-water will enter theboiler practically pure and at steam temperature.

WVhen it is desired to clear out the deposits formed within the tubes,the valve or cock E on the supply-pipe D and the regulatingvalve I areclosed, the blow-off cock L on the settling-box G being opened and thewater in the apparatus being allowed to run off.. The valve M on thesteam-pipe F is then opened and steam admitted to blow through the tubesA B, whereby all impurities are driven out through the blow-off K.

After the operation of blowing off has been effected hot Water from theboiler is allowed to enter and fill the longitudinal tubes A B byopening the regulating-valve I. By this means the condensation orunequal contraction that would occur if the feed-Water were introducedinto the emptyhot pipes is avoided.

What I claim as my invention, and desire to secure by Letters Patent, is

In combination with the horizontal boiler,

the feed-Water pipes extending longitudinally of the upper part thereof,the inlet-pipe A bethe rear end of the boiler, the mud-drum dependingfrom the front or outlet end of the pipe B, the connection from the saidmuddrum to the boiler, and the steam-pipe at the front of the boilerconnecting the steam-space with the inlet-pipe A whereby said pipe A,the rear cross-pipe O the pipe B, and the muddrunl maybe blown out,substantially as described.

In witness whereof I have hereunto set my hand in presence of twowitnesses.

JAMES EDMUND CARROLL.

